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Diffstat (limited to 'dom/media/webvtt/TextTrackList.cpp')
| -rw-r--r-- | dom/media/webvtt/TextTrackList.cpp | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/dom/media/webvtt/TextTrackList.cpp b/dom/media/webvtt/TextTrackList.cpp new file mode 100644 index 0000000000..d5611bdaf9 --- /dev/null +++ b/dom/media/webvtt/TextTrackList.cpp @@ -0,0 +1,192 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/dom/TextTrackList.h" + +#include "mozilla/DebugOnly.h" +#include "mozilla/dom/Event.h" +#include "mozilla/dom/TextTrackListBinding.h" +#include "mozilla/dom/TrackEvent.h" +#include "nsThreadUtils.h" +#include "nsGlobalWindow.h" +#include "mozilla/dom/TextTrackCue.h" +#include "mozilla/dom/TextTrackManager.h" + +namespace mozilla::dom { + +NS_IMPL_CYCLE_COLLECTION_INHERITED(TextTrackList, DOMEventTargetHelper, + mTextTracks, mTextTrackManager) + +NS_IMPL_ADDREF_INHERITED(TextTrackList, DOMEventTargetHelper) +NS_IMPL_RELEASE_INHERITED(TextTrackList, DOMEventTargetHelper) +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TextTrackList) +NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper) + +TextTrackList::TextTrackList(nsPIDOMWindowInner* aOwnerWindow) + : DOMEventTargetHelper(aOwnerWindow) {} + +TextTrackList::TextTrackList(nsPIDOMWindowInner* aOwnerWindow, + TextTrackManager* aTextTrackManager) + : DOMEventTargetHelper(aOwnerWindow), + mTextTrackManager(aTextTrackManager) {} + +TextTrackList::~TextTrackList() = default; + +void TextTrackList::GetShowingCues(nsTArray<RefPtr<TextTrackCue>>& aCues) { + // Only Subtitles and Captions can show on the screen. + nsTArray<RefPtr<TextTrackCue>> cues; + for (uint32_t i = 0; i < Length(); i++) { + if (mTextTracks[i]->Mode() == TextTrackMode::Showing && + (mTextTracks[i]->Kind() == TextTrackKind::Subtitles || + mTextTracks[i]->Kind() == TextTrackKind::Captions)) { + mTextTracks[i]->GetActiveCueArray(cues); + aCues.AppendElements(cues); + } + } +} + +JSObject* TextTrackList::WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return TextTrackList_Binding::Wrap(aCx, this, aGivenProto); +} + +TextTrack* TextTrackList::IndexedGetter(uint32_t aIndex, bool& aFound) { + aFound = aIndex < mTextTracks.Length(); + if (!aFound) { + return nullptr; + } + return mTextTracks[aIndex]; +} + +TextTrack* TextTrackList::operator[](uint32_t aIndex) { + return mTextTracks.SafeElementAt(aIndex, nullptr); +} + +already_AddRefed<TextTrack> TextTrackList::AddTextTrack( + TextTrackKind aKind, const nsAString& aLabel, const nsAString& aLanguage, + TextTrackMode aMode, TextTrackReadyState aReadyState, + TextTrackSource aTextTrackSource, const CompareTextTracks& aCompareTT) { + RefPtr<TextTrack> track = + new TextTrack(GetOwner(), this, aKind, aLabel, aLanguage, aMode, + aReadyState, aTextTrackSource); + AddTextTrack(track, aCompareTT); + return track.forget(); +} + +void TextTrackList::AddTextTrack(TextTrack* aTextTrack, + const CompareTextTracks& aCompareTT) { + if (mTextTracks.Contains(aTextTrack)) { + return; + } + mTextTracks.InsertElementSorted(aTextTrack, aCompareTT); + aTextTrack->SetTextTrackList(this); + CreateAndDispatchTrackEventRunner(aTextTrack, u"addtrack"_ns); +} + +TextTrack* TextTrackList::GetTrackById(const nsAString& aId) { + nsAutoString id; + for (uint32_t i = 0; i < Length(); i++) { + mTextTracks[i]->GetId(id); + if (aId.Equals(id)) { + return mTextTracks[i]; + } + } + return nullptr; +} + +void TextTrackList::RemoveTextTrack(TextTrack* aTrack) { + if (mTextTracks.RemoveElement(aTrack)) { + CreateAndDispatchTrackEventRunner(aTrack, u"removetrack"_ns); + } +} + +class TrackEventRunner : public Runnable { + public: + TrackEventRunner(TextTrackList* aList, Event* aEvent) + : Runnable("dom::TrackEventRunner"), mList(aList), mEvent(aEvent) {} + + NS_IMETHOD Run() override { return mList->DispatchTrackEvent(mEvent); } + + RefPtr<TextTrackList> mList; + + private: + RefPtr<Event> mEvent; +}; + +nsresult TextTrackList::DispatchTrackEvent(Event* aEvent) { + return DispatchTrustedEvent(aEvent); +} + +void TextTrackList::CreateAndDispatchChangeEvent() { + MOZ_ASSERT(NS_IsMainThread()); + nsPIDOMWindowInner* win = GetOwner(); + if (!win) { + return; + } + + RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr); + + event->InitEvent(u"change"_ns, false, false); + event->SetTrusted(true); + + nsCOMPtr<nsIRunnable> eventRunner = new TrackEventRunner(this, event); + nsGlobalWindowInner::Cast(win)->Dispatch(TaskCategory::Other, + eventRunner.forget()); +} + +void TextTrackList::CreateAndDispatchTrackEventRunner( + TextTrack* aTrack, const nsAString& aEventName) { + DebugOnly<nsresult> rv; + nsCOMPtr<nsIEventTarget> target = GetMainThreadSerialEventTarget(); + if (!target) { + // If we are not able to get the main-thread object we are shutting down. + return; + } + + TrackEventInit eventInit; + eventInit.mTrack.SetValue().SetAsTextTrack() = aTrack; + RefPtr<TrackEvent> event = + TrackEvent::Constructor(this, aEventName, eventInit); + + // Dispatch the TrackEvent asynchronously. + rv = target->Dispatch(do_AddRef(new TrackEventRunner(this, event)), + NS_DISPATCH_NORMAL); + + // If we are shutting down this can file but it's still ok. + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Dispatch failed"); +} + +HTMLMediaElement* TextTrackList::GetMediaElement() { + if (mTextTrackManager) { + return mTextTrackManager->mMediaElement; + } + return nullptr; +} + +void TextTrackList::SetTextTrackManager(TextTrackManager* aTextTrackManager) { + mTextTrackManager = aTextTrackManager; +} + +void TextTrackList::SetCuesInactive() { + for (uint32_t i = 0; i < Length(); i++) { + mTextTracks[i]->SetCuesInactive(); + } +} + +bool TextTrackList::AreTextTracksLoaded() { + // Return false if any texttrack is not loaded. + for (uint32_t i = 0; i < Length(); i++) { + if (!mTextTracks[i]->IsLoaded()) { + return false; + } + } + return true; +} + +nsTArray<RefPtr<TextTrack>>& TextTrackList::GetTextTrackArray() { + return mTextTracks; +} + +} // namespace mozilla::dom |